-- The MIT License
-- 
-- Copyright (c) 2008 Matthew Maravillas, Patrick Quinn
-- 
-- Permission is hereby granted, free of charge, to any person obtaining a copy
-- of this software and associated documentation files (the "Software"), to deal
-- in the Software without restriction, including without limitation the rights
-- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-- copies of the Software, and to permit persons to whom the Software is
-- furnished to do so, subject to the following conditions:
-- 
-- The above copyright notice and this permission notice shall be included in
-- all copies or substantial portions of the Software.
-- 
-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-- THE SOFTWARE.

-- Based on http://forums.gaspowered.com/viewtopic.php?t=17197

local unitIconPath = "/mods/KotH/icons/units/"

do
    local MyUnitIdTable = {
        'uabk1001',
        'urbk1001',
        'uebk1001',
    }
    local oldFileNameFn = GetUnitIconFileNames
   
    local function IsMyUnit(blueprint)
        for i, v in MyUnitIdTable do
            if v == blueprint.Display.IconName then
                return true
            end
        end
        return false
    end
   
    function GetUnitIconFileNames(blueprint)
        if IsMyUnit(blueprint) then
            local iconName = unitIconPath .. blueprint.Display.IconName .. "_icon.dds"
            local upIconName = unitIconPath .. blueprint.Display.IconName .. "_build_btn_up.dds"
            local downIconName = unitIconPath .. blueprint.Display.IconName .. "_build_btn_down.dds"
            local overIconName = unitIconPath .. blueprint.Display.IconName .. "_build_btn_over.dds"
         
            if DiskGetFileInfo(iconName) == false then
                WARN('Blueprint icon for unit '.. blueprint.Display.IconName ..' could not be found, check your file path and icon names!')
                iconName = '/textures/ui/common/icons/units/default_icon.dds'
            end
         
            if DiskGetFileInfo(upIconName) == false then
                upIconName = iconName
            end

            if DiskGetFileInfo(downIconName) == false then
                downIconName = iconName
            end

            if DiskGetFileInfo(overIconName) == false then
                overIconName = iconName
            end
         
            return iconName, upIconName, downIconName, overIconName
        else
            return oldFileNameFn(blueprint)
        end
    end
end